mirror of
https://github.com/phooky/Apple-410.git
synced 2024-10-31 21:07:02 +00:00
159 lines
4.2 KiB
Python
Executable File
159 lines
4.2 KiB
Python
Executable File
#!/usr/bin/python3
|
|
import sys
|
|
import math
|
|
import cairo
|
|
|
|
def coordlist(line,expected=-1):
|
|
l = list(map(float,line.split(',')))
|
|
if expected > -1:
|
|
assert len(l) == expected
|
|
return l
|
|
|
|
#pens = [
|
|
# svgwrite.rgb(0, 0, 0, '%'),
|
|
# svgwrite.rgb(100, 0, 0, '%'),
|
|
# svgwrite.rgb(0, 100, 0, '%'),
|
|
# svgwrite.rgb(0, 0, 100, '%') ]
|
|
|
|
# Default W/H
|
|
W = 2394
|
|
H = 1759
|
|
LW = 5
|
|
|
|
class CairoPlotter:
|
|
|
|
def __init__(self, path):
|
|
self.surface = cairo.SVGSurface(path, W, H)
|
|
self.context = cairo.Context(self.surface)
|
|
#self.context.scale(W,H)
|
|
self.context.select_font_face("monospace")
|
|
self.pennum = 0
|
|
self.viewport = (0, 0, W, H)
|
|
self.window = (0, 0, W, H)
|
|
self.text_theta = 0
|
|
self.text_size = 1
|
|
#self.pos = (0,0)
|
|
#self.clip = None
|
|
#self.clipno = 0
|
|
self.in_path = False
|
|
self.update_ctm()
|
|
self.context.set_line_width(LW)
|
|
|
|
# A quick review of coordinate systems:
|
|
# Cairo native: origin at upper left, x+ to right, y+ down.
|
|
# Plotter native: origin at lower left, x+ to right, y+ up.
|
|
# Plotter window: same as plotter native.
|
|
# We want to display in plotter native.
|
|
def update_ctm(self):
|
|
pn_to_cn = cairo.Matrix(yy=-1.0, y0=H)
|
|
self.context.set_matrix(pn_to_cn)
|
|
|
|
def update_font(self):
|
|
m = cairo.Matrix(xx=self.text_size, yy=-self.text_size)
|
|
m2 = cairo.Matrix.init_rotate(math.radians(self.text_theta))
|
|
m.multiply(m2)
|
|
self.context.set_font_matrix(m)
|
|
|
|
def finish_path(self):
|
|
if self.in_path:
|
|
self.context.stroke_preserve()
|
|
self.in_path = False
|
|
|
|
def invalidate_window(self):
|
|
pass
|
|
|
|
def vp(self, params):
|
|
self.invalidate_window()
|
|
l=coordlist(params,4)
|
|
self.viewport=(l[0],l[1],l[2],l[3])
|
|
|
|
def wd(self, params):
|
|
self.invalidate_window()
|
|
l=coordlist(params,4)
|
|
self.window=(l[0],l[1],l[2],l[3])
|
|
|
|
def ma(self, params):
|
|
l=coordlist(params,2)
|
|
self.context.move_to(l[0],l[1])
|
|
|
|
def mr(self, params):
|
|
l=coordlist(params,2)
|
|
p=self.context.get_current_point()
|
|
self.context.move_to(p[0]+l[0],p[1]+l[1])
|
|
|
|
def da(self, params):
|
|
l=coordlist(params)
|
|
self.in_path = True
|
|
while len(l) > 0:
|
|
x, y, l = l[0],l[1],l[2:]
|
|
self.context.line_to(x,y)
|
|
|
|
def dr(self, params):
|
|
l=coordlist(params)
|
|
self.in_path = True
|
|
while len(l) > 0:
|
|
x, y, l = l[0],l[1],l[2:]
|
|
p=self.context.get_current_point()
|
|
self.context.line_to(p[0]+x,p[1]+y)
|
|
|
|
def ca(self, params):
|
|
self.context.new_sub_path()
|
|
l=coordlist(params)
|
|
r=l[0]
|
|
if len(l) > 2:
|
|
p=(l[1],l[2])
|
|
else:
|
|
p=self.context.get_current_point()
|
|
self.context.arc(p[0],p[1],r,0.0,math.pi*2)
|
|
|
|
def ac(self,params):
|
|
l=coordlist(params)
|
|
r=l[0]
|
|
if len(l) > 3:
|
|
p=(l[3],l[4])
|
|
else:
|
|
p=self.pos
|
|
t2, t1 = math.radians(l[1]),math.radians(l[2])
|
|
self.context.arc(p[0],p[1],r,t1,t2)
|
|
|
|
def lr(self,params):
|
|
self.text_theta = float(params)
|
|
self.update_font()
|
|
|
|
def ls(self,params):
|
|
self.text_size = float(params)
|
|
self.update_font()
|
|
|
|
def ps(self,params):
|
|
self.finish_path()
|
|
self.pennum = int(params) - 1
|
|
|
|
def pl(self,params):
|
|
self.finish_path()
|
|
(x,y) = self.context.get_current_point()
|
|
sys.stderr.write("text at {} {}\n".format(x,y))
|
|
self.context.show_text(params)
|
|
|
|
def write(self,out):
|
|
self.finish_path()
|
|
self.surface.finish()
|
|
|
|
def process_cmd(self,command):
|
|
cmd_code = command[0:2].lower()
|
|
params = command[2:]
|
|
try:
|
|
getattr(self,cmd_code)(params)
|
|
except AttributeError:
|
|
sys.stderr.write("Unrecognized command code {}\n".format(cmd_code))
|
|
|
|
def read(self,inf):
|
|
for line in inf.readlines():
|
|
line = line.strip()
|
|
self.process_cmd(line)
|
|
|
|
if __name__=='__main__':
|
|
p = CairoPlotter('foo.svg')
|
|
p.read(sys.stdin)
|
|
p.write(sys.stdout)
|
|
|